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com.google.gwt.user.server.rpc</FONT>
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Class RPCServletUtils</H2>
<PRE>
java.lang.Object
  <IMG SRC="../../../../../../resources/inherit.gif" ALT="extended by "><B>com.google.gwt.user.server.rpc.RPCServletUtils</B>
</PRE>
<HR>
<DL>
<DT><PRE>public class <B>RPCServletUtils</B><DT>extends java.lang.Object</DL>
</PRE>

<P>
Utility class containing helper methods used by servlets that integrate with
 the RPC system.
<P>

<P>
<HR>

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<CODE>static&nbsp;boolean</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../../../../com/google/gwt/user/server/rpc/RPCServletUtils.html#acceptsGzipEncoding(javax.servlet.http.HttpServletRequest)">acceptsGzipEncoding</A></B>(javax.servlet.http.HttpServletRequest&nbsp;request)</CODE>

<BR>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Returns <code>true</code> if the <CODE>HttpServletRequest</CODE> accepts Gzip
 encoding.</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>static&nbsp;boolean</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../../../../com/google/gwt/user/server/rpc/RPCServletUtils.html#exceedsUncompressedContentLengthLimit(java.lang.String)">exceedsUncompressedContentLengthLimit</A></B>(java.lang.String&nbsp;content)</CODE>

<BR>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Returns <code>true</code> if the response content's estimated UTF-8 byte
 length exceeds 256 bytes.</TD>
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<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>static&nbsp;java.lang.String</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../../../../com/google/gwt/user/server/rpc/RPCServletUtils.html#readContentAsUtf8(javax.servlet.http.HttpServletRequest)">readContentAsUtf8</A></B>(javax.servlet.http.HttpServletRequest&nbsp;request)</CODE>

<BR>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Returns the content of an <CODE>HttpServletRequest</CODE> by decoding it using
 the UTF-8 charset.</TD>
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<TR BGCOLOR="white" CLASS="TableRowColor">
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<CODE>static&nbsp;java.lang.String</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../../../../com/google/gwt/user/server/rpc/RPCServletUtils.html#readContentAsUtf8(javax.servlet.http.HttpServletRequest, boolean)">readContentAsUtf8</A></B>(javax.servlet.http.HttpServletRequest&nbsp;request,
                  boolean&nbsp;checkHeaders)</CODE>

<BR>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Returns the content of an <CODE>HttpServletRequest</CODE> by decoding it using
 the UTF-8 charset.</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>static&nbsp;boolean</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../../../../com/google/gwt/user/server/rpc/RPCServletUtils.html#shouldGzipResponseContent(javax.servlet.http.HttpServletRequest, java.lang.String)">shouldGzipResponseContent</A></B>(javax.servlet.http.HttpServletRequest&nbsp;request,
                          java.lang.String&nbsp;responseContent)</CODE>

<BR>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Returns <code>true</code> if the request accepts gzip encoding and the
 the response content's estimated UTF-8 byte length exceeds 256 bytes.</TD>
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<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>static&nbsp;void</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../../../../com/google/gwt/user/server/rpc/RPCServletUtils.html#writeResponse(javax.servlet.ServletContext, javax.servlet.http.HttpServletResponse, java.lang.String, boolean)">writeResponse</A></B>(javax.servlet.ServletContext&nbsp;servletContext,
              javax.servlet.http.HttpServletResponse&nbsp;response,
              java.lang.String&nbsp;responseContent,
              boolean&nbsp;gzipResponse)</CODE>

<BR>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Write the response content into the <CODE>HttpServletResponse</CODE>.</TD>
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<CODE>static&nbsp;void</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../../../../com/google/gwt/user/server/rpc/RPCServletUtils.html#writeResponseForUnexpectedFailure(javax.servlet.ServletContext, javax.servlet.http.HttpServletResponse, java.lang.Throwable)">writeResponseForUnexpectedFailure</A></B>(javax.servlet.ServletContext&nbsp;servletContext,
                                  javax.servlet.http.HttpServletResponse&nbsp;response,
                                  java.lang.Throwable&nbsp;failure)</CODE>

<BR>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Called when the servlet itself has a problem, rather than the invoked
 third-party method.</TD>
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<TH ALIGN="left"><B>Methods inherited from class java.lang.Object</B></TH>
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<TD><CODE>clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait</CODE></TD>
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<A NAME="acceptsGzipEncoding(javax.servlet.http.HttpServletRequest)"><!-- --></A><H3>
acceptsGzipEncoding</H3>
<PRE>
public static boolean <B>acceptsGzipEncoding</B>(javax.servlet.http.HttpServletRequest&nbsp;request)</PRE>
<DL>
<DD>Returns <code>true</code> if the <CODE>HttpServletRequest</CODE> accepts Gzip
 encoding. This is done by checking that the accept-encoding header
 specifies gzip as a supported encoding.
<P>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>request</CODE> - the request instance to test for gzip encoding acceptance
<DT><B>Returns:</B><DD><code>true</code> if the <CODE>HttpServletRequest</CODE> accepts Gzip
         encoding</DL>
</DD>
</DL>
<HR>

<A NAME="exceedsUncompressedContentLengthLimit(java.lang.String)"><!-- --></A><H3>
exceedsUncompressedContentLengthLimit</H3>
<PRE>
public static boolean <B>exceedsUncompressedContentLengthLimit</B>(java.lang.String&nbsp;content)</PRE>
<DL>
<DD>Returns <code>true</code> if the response content's estimated UTF-8 byte
 length exceeds 256 bytes.
<P>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>content</CODE> - the contents of the response
<DT><B>Returns:</B><DD><code>true</code> if the response content's estimated UTF-8 byte
         length exceeds 256 bytes</DL>
</DD>
</DL>
<HR>

<A NAME="readContentAsUtf8(javax.servlet.http.HttpServletRequest)"><!-- --></A><H3>
readContentAsUtf8</H3>
<PRE>
public static java.lang.String <B>readContentAsUtf8</B>(javax.servlet.http.HttpServletRequest&nbsp;request)
                                          throws java.io.IOException,
                                                 javax.servlet.ServletException</PRE>
<DL>
<DD>Returns the content of an <CODE>HttpServletRequest</CODE> by decoding it using
 the UTF-8 charset.
<P>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>request</CODE> - the servlet request whose content we want to read
<DT><B>Returns:</B><DD>the content of an <CODE>HttpServletRequest</CODE> by decoding it using
         the UTF-8 charset
<DT><B>Throws:</B>
<DD><CODE>java.io.IOException</CODE> - if the requests input stream cannot be accessed, read
           from or closed
<DD><CODE>javax.servlet.ServletException</CODE> - if the content length of the request is not
           specified of if the request's content type is not
           'text/x-gwt-rpc' and 'charset=utf-8'</DL>
</DD>
</DL>
<HR>

<A NAME="readContentAsUtf8(javax.servlet.http.HttpServletRequest, boolean)"><!-- --></A><H3>
readContentAsUtf8</H3>
<PRE>
public static java.lang.String <B>readContentAsUtf8</B>(javax.servlet.http.HttpServletRequest&nbsp;request,
                                                 boolean&nbsp;checkHeaders)
                                          throws java.io.IOException,
                                                 javax.servlet.ServletException</PRE>
<DL>
<DD>Returns the content of an <CODE>HttpServletRequest</CODE> by decoding it using
 the UTF-8 charset.
<P>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>request</CODE> - the servlet request whose content we want to read<DD><CODE>checkHeaders</CODE> - Specify 'true' to check the Content-Type header to see
          that it matches the expected value 'text/x-gwt-rpc' and the
          content encoding is UTF-8. Disabling this check may allow some
          types of cross type security attacks.
<DT><B>Returns:</B><DD>the content of an <CODE>HttpServletRequest</CODE> by decoding it using
         the UTF-8 charset
<DT><B>Throws:</B>
<DD><CODE>java.io.IOException</CODE> - if the requests input stream cannot be accessed, read
           from or closed
<DD><CODE>javax.servlet.ServletException</CODE> - if the content length of the request is not
           specified of if the request's content type is not
           'text/x-gwt-rpc' and 'charset=utf-8'</DL>
</DD>
</DL>
<HR>

<A NAME="shouldGzipResponseContent(javax.servlet.http.HttpServletRequest, java.lang.String)"><!-- --></A><H3>
shouldGzipResponseContent</H3>
<PRE>
public static boolean <B>shouldGzipResponseContent</B>(javax.servlet.http.HttpServletRequest&nbsp;request,
                                                java.lang.String&nbsp;responseContent)</PRE>
<DL>
<DD>Returns <code>true</code> if the request accepts gzip encoding and the
 the response content's estimated UTF-8 byte length exceeds 256 bytes.
<P>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>request</CODE> - the request associated with the response content<DD><CODE>responseContent</CODE> - a string that will be
<DT><B>Returns:</B><DD><code>true</code> if the request accepts gzip encoding and the
         the response content's estimated UTF-8 byte length exceeds 256
         bytes</DL>
</DD>
</DL>
<HR>

<A NAME="writeResponse(javax.servlet.ServletContext, javax.servlet.http.HttpServletResponse, java.lang.String, boolean)"><!-- --></A><H3>
writeResponse</H3>
<PRE>
public static void <B>writeResponse</B>(javax.servlet.ServletContext&nbsp;servletContext,
                                 javax.servlet.http.HttpServletResponse&nbsp;response,
                                 java.lang.String&nbsp;responseContent,
                                 boolean&nbsp;gzipResponse)
                          throws java.io.IOException</PRE>
<DL>
<DD>Write the response content into the <CODE>HttpServletResponse</CODE>. If
 <code>gzipResponse</code> is <code>true</code>, the response content
 will be gzipped prior to being written into the response.
<P>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>servletContext</CODE> - servlet context for this response<DD><CODE>response</CODE> - response instance<DD><CODE>responseContent</CODE> - a string containing the response content<DD><CODE>gzipResponse</CODE> - if <code>true</code> the response content will be
          gzip encoded before being written into the response
<DT><B>Throws:</B>
<DD><CODE>java.io.IOException</CODE> - if reading, writing, or closing the response's output
           stream fails</DL>
</DD>
</DL>
<HR>

<A NAME="writeResponseForUnexpectedFailure(javax.servlet.ServletContext, javax.servlet.http.HttpServletResponse, java.lang.Throwable)"><!-- --></A><H3>
writeResponseForUnexpectedFailure</H3>
<PRE>
public static void <B>writeResponseForUnexpectedFailure</B>(javax.servlet.ServletContext&nbsp;servletContext,
                                                     javax.servlet.http.HttpServletResponse&nbsp;response,
                                                     java.lang.Throwable&nbsp;failure)</PRE>
<DL>
<DD>Called when the servlet itself has a problem, rather than the invoked
 third-party method. It writes a simple 500 message back to the client.
<P>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>servletContext</CODE> - <DD><CODE>response</CODE> - <DD><CODE>failure</CODE> - </DL>
</DD>
</DL>
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